- Ratcliffe, Brett 85
- Thomas, D., Ratcliffe, B. & Caldwell, D. L. 23
- Thomas, D., Howden, H. & Ratcliffe, B. 18
- Ratcliffe, Brett C 14
- Ratcliffe, Brett C ; Jameson, M. ; Smith, Dr. Andrew B T ; Villatoro, Karla E. 8
- Brett Ratcliffe 7
- Thomas, D., Ratcliffe, B. et al. 6
- Brett Ratcliffe; M. Jameson 2
- Ratcliffe, Brett C ; Jameson, M. 2
- Ashe, S., Ratcliffe, B. & Thomas, D. 2
- Ratcliffe, B 2
- Ratcliffe, B. & Messenger, C. 1
- M. A. Morón; L. Delgado; B. Ratcliffe 1
- B. Ratcliffe 1
- B. Ratcliffe; M. Jameson 1
- J. Yoshimoto 1
- B. Ratcliffe & M. Jameson 1
- B. Ratcliffe & C. Messenger 1
- Ratcliffe, Brett C ; Jameson ; Smith ; Villatoro, Karla E. 1
- Howden, Professor Henry F ; Ratcliffe, Brett C ; Thomas, Donald B. 1